// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- desc: > IteratorClose is called when reference evaluation produces a "return" completion info: | ArrayAssignmentPattern : [ AssignmentElementList ] [...] 5. If iteratorRecord.[[done]] is false, return IteratorClose(iterator, result). 6. Return result. 7.4.6 IteratorClose( iterator, completion ) [...] 6. Let innerResult be Call(return, iterator, « »). 7. If completion.[[type]] is throw, return Completion(completion). 8. If innerResult.[[type]] is throw, return Completion(innerResult). features: [Symbol.iterator, generators] template: default es6id: 12.14.5.2 esid: sec-runtime-semantics-destructuringassignmentevaluation ---*/ //- setup var returnCount = 0; var unreachable = 0; var iterable = {}; var iterator = { return: function() { returnCount += 1; throw new Test262Error(); } }; var iter; iterable[Symbol.iterator] = function() { return iterator; }; function* g() { //- elems [ {}[ yield ] ] //- vals iterable //- body unreachable += 1; //- teardown } iter = g(); iter.next(); assert.throws(Test262Error, function() { iter.return(); }); assert.sameValue(returnCount, 1); assert.sameValue(unreachable, 0, 'Unreachable statement was not executed');